Rinaldo Orsini
Rinaldo Orsini (1217–1286) was founder of the Orsini line of Monterotondo. The third son of Matteo Rosso Orsini and a brother of Pope Nicholas III, he served as podestà of Foligno in 1262.
When Henry of Castile entered Rome and joined the Ghibellines later that year, Rinaldo fled and fortified himself in Marino, returning only after Conradin's defeat in 1268. He died in 1286, leaving sons including the future cardinal Napoleone Orsini.